Swivel



Oct. 18, 1927.

J. J. FRY

SWIVEL Filed 001'.. 2,2. 1926 Invkntof.' zfon tfy Attorney Patented Oct.18, 1927.

UNITED STATES JOHN J. FRY, OF LOGAN CITY, UTAH.

SWIVEL.

Application filed October 22, 1926. Serial No. 143,474.

This invention relates to an improved swivel construction which isespecially, but not necessarily adapted to be used in the constructionof a derrick such as is employed in hay and grain loading and unloadingdevices.

Briefly, the invention relates to a structure which embodies a specialplate for disposition on top of a standard, an attaching plate for arocking boom or beam, and a special collar interposed between these twoplates, th-e collar being constructed to provide a bearing forsupporting ears carried by the attaching plate, and being furtherconstructed to provide a novel rotary joint between itself and the topplate on the standard.

My principal aim is to provide a structure of this kind which permitsfree rocking of the boom for raising and lowering purposes and permitsit to be rotated about a vertical aXis simultaneously with the rockingmovement to facilitate loading and unloading.

Other features and advantages will become apparent from the followingdescription and drawing.

In the drawings:

Figure 1 is a side view with portions in section and elevation showingthe complete structure,

Fig. 2 is a view at right angles to Fig. 1,

Fig. 3 is a perspective view of the thrust and bearing collar.

Referring to the drawing in detail, it will be vseen that the referencecharacter 1 designates a vertically disposed supporting standard whichis provided at its top with a central socket in which a metal liningtube or sleeve 2 is fitted. A circular plate 3 is secured, in anyappropriate way, to the top of the standard and is provided at itscenter with an opening in registry with the metallined socket. It willbe noted that the portion d of this plate is thickened and provided withan annular groove.

The beam or boom is represented by the reference character 5. As beforeindicated a plate 6 of elongated form is fastened to the underside ofthis beam and this plate is provided between its ends and on oppositelongitudinal sides with depending ears 7, the lower edges of which arerounded to represent a segment of a circle. These ears are provided withalined bolt holes.

Interposed between the ears and the grooved portion of the plate 3 is aspecial bearing and thrust collar designated generally by the referencecharacter 8. The collar is formed on its bottom with a circular rib ofsubstantially semi-circular cross section, the same being seated in thegroove in the part t. By directing attention to Fig. 3 it will be seenthat the collar is provided with a central spindle hole 9 and withcentral upstanding lugs 10 and on opposite sides of these lugs withsubstantially semi-circular seats 11 for reception of thecorrespondingly shaped portions of the aforesaid ears 7. A swivel andretaining pin 12 extends d0Wnwardly through the hole 9, through thecentral hole in the plate 3 and into the tube 2. This constitutes a kingbolt and it will be noted that it is provided at its upper end with aneye 13 located between the ears 7 and it merges with the apertures inthese ears. A bolt 14 passes through said apertures and is equipped witha retaining nut 15.

From the foregoing, it is obvious that the ears 7 have rocking contactwith the semicircular seats 11 in the special swivel collar 8. Theswivel spindle or bolt 12 maintains the parts in assembled relation andallows the simultaneous rocking and swivel action of the beam 5.

It is believed that by considering the description in connection withthe drawings a clear understanding of the operation and construction ofthe invention will be had. Therefore, a more lengthy description isthought unnecessary.

Minor changes coming within the field of invention claimed may beresorted to if desired.

I claim:

1. In a structure of the class described, in combination, a verticalsupporting standard having a central socket at its top, a wear plate ontop of the standard having a central opening alined with said socket, abeam, a spindle and connecting bolt having pivotal connection with thebeam and eX- tending into said socket, and means interposed between saidtop plate and beam for transmitting the load from the beam to said topplate.

2. In a structure of the class described, a standard top plate having acentral opening surrounded by an annular groove, a beam plate providedwith spaced parallel depending ears having rounded lower edge portions,a collar interposed between said ears and top plate, said collar havinga rib for reception in said groove and being provided with semicircularseats for reception of said ears, and means for maintaining said partsin assembled relation.

3. In a structure of the class described, a vertical supporting standardhaving a central socket in its top, a top plate fitted on the upper endof the standard and connected to the latter, said top plate having acentral hole in alinement with said socket, having a central thickenedportion surrounding the hole, and said thickened portion being formed inits top withan annular groove, a plate adapted to be attached to arocking beam, said beam plate having spaced parallel ears provided witha rounded lower edge portion, a circular collar interposed between saidears and said top plate, said collar having an annular rib on its bottomtted into said groove, being provided with a central hole in alinementwith the hole in said top plate, being .formed with semicircular'bearingSeats, and upstanding lugs, said ears fitting rockably in said seats,and Said lugs extending up between said ears, a spindle and connectingbolt extending down through the holes in said collar and top plate g andinto saidv` sockets, said spindle bolt having the head on its upper endlocated between said ears, and a `connecting bolt passing through ysaidears and throughthe ead In testimony whereof I aix my signature.

on said spindle bolt.

JOHN J. FRY.

